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Finding the Fourth Proportional to 528,159.28, 728,860.20 and 286,441.80

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Solution

The fourth proportional to 528,159.28, 728,860.20 and 286,441.80 is: 395,289.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,159.28 : 728,860.20 = 286,441.80 : x
  2. Step 2: Convert to fraction form
    528,159.28/728,860.20 = 286,441.80/x
  3. Step 3: Cross multiply
    528,159.28x = 728,860.20 × 286,441.80
  4. Step 4: Simplify right side
    528,159.28x = 208,776,027,636.36
  5. Step 5: Solve for x
    x = 208,776,027,636.36/528,159.28
  6. Step 6: Final answer
    x = 395,289.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.